Home / 891-987

Finding the Third Proportional to 891 and 987

Calculator

Solution

The third proportional to 891 and 987 is: 1,093.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    891 : 987 = 987 : x
  2. Step 2: Convert to fraction form
    891/987 = 987/x
  3. Step 3: Cross multiply
    891x = 987 × 987
  4. Step 4: Simplify right side
    891x = 974,169
  5. Step 5: Solve for x
    x = 974,169/891
  6. Step 6: Final answer
    x = 1,093.34

Related Problems

Find third proportional to 445.50 and 493.50
Half scale
Find third proportional to 1,782 and 1,974
Double scale
Find third proportional to 893 and 989
Similar ratio
Find third proportional to 1,336.50 and 1,480.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.